@Riot, make first dragon stack give a %damage bonus, instead of %AD and AP..

TL;DR #In my opinion, switching the first dragonslayer bonus to increase physical and magic damage dealt by 6% would be a better solution for increasing the damage , and it would allow for more interesting team compositions, thanks to its impartial benefits to both fighters, tanks, or carries.

6%AD and AP effectiveness is directly related to how much AD and AP you have. This means that, for tanks who don't build AD or AP, or for supports, it's much less effective than it is for damage dealers . Sure, Nami Soraka and janna will have a bit less of shields/heals, but the first dragon slayer stack is supposed to promote damage. For damage dealers, it's almost the same. A Jayce that deals 6%bonus physical damage, or a Jayce with 6%bonus AD, it's still dealing more damage than a Jayce without neither of said buffs. However, the break-even point of damage between old and new will vary with each champion, but it's safe to say that, on average, champions with low ratio would benefit more , and champion with high ratio will benefit slightly less (once they have build enough AD and AP). This change would help fighters and tanks , increasing the effect that dragon has on them, with a small impact on other champions. even if 6% proves to be too strong in light of the base damage from spells, it would still be possible to tune it down while keeping the newfound balance with tank and fighters, like, decreasing the % of bonus damage or moving it down through the dragonslayer buff order(I mean, at which stack is unlocked).

For example, let's pick, Karthus's Lay Waste. it's damage (rank 5) and Ap ratios are 240+60%AP. With the new proposed change, it would be (240+60%AP)*1,06=254,4+63,6%AP. As it is on live, it's 240+60%AP, but you have 6% more ap , so your AP is 1,06 compared to the previous case. which means, the magic damage it's 240+63,6% Ap. it's a slight buff, but please note that the Ap ratios are unchanged. This means that regardless of how much ap you get, you have the same results as before. This means the buff is felt more by champions that don't build ap (the concept behind the change). However, since the extra ad and ap, the extra damage against turrets is lost. So it increases slightly the damage against champions (from base) but nerfs slightly the damage against buildings. Overall it doesn't shift the balance significantly.

However, this is a lot more effective for tanks. Let's pick a recently buffed tank, Sejuani, and compare the change. Sejuani W damage is 12%+3% per 100 AP of enemy max health on-hit. 160+12% Sejuani's max health+60%AP AoE.

With LIVE dragonslayer stack version. 12%+3,18% per 100 AP of enemy max health on-hit (the better ratio is a result of the %extra ap from the buff). 160+12%max health+63,6%AP AoE.

With proposed dragonslayer stack change. 12,72%+3,18% per 100 AP of enemy mex health on-hit. 169,6+12,72% Sejuan's Max health+63,6%AP.

Notice the change? The AP ratios are still the same, as there is no change between multiplying for 1.06 either your ap, or your magic damage (thus your AP ratios). However, for champions who don't build AP this damage would be a significant buff as it would increase their damage by a bigger %.

of course, since it's an overall buff this could make the dragonslayer stacks even more snowbally, but, as I said, this is not about wether the buff is balanced or not, but about how to make the buff more impartial and fair across all champions roles. If it proves to be too strong, it can be nerfed afterward, but it would still have the benefits of making the dragon buff a better bonus regardless of what champions you are picking.